Report of a Missio)i to Guam. 125 



Two dorsal fins. Anal papillae distinct. The back, in front of first 

 dorsal somewhat concave. Fins: Caudal rounded. First dorsal fin 

 small, its height a little more than one-half depth of bod}-. Pect- 

 orals equal to distance from hind margin of preopercle to anterior 

 of orbit. Soft dorsal fin almost one-half higher than spinous dorsal, 

 its base slightly greater than base of anal. Color in spirits: Leaden 

 black, sometimes lighter below with slight wash of yellowish. Fins 

 dusky with lighter fine yellowish lines or dots. Four specimens, 

 length 5-6.50 inches. Guam, May 31, 1900. Hab. Polynesia,, 

 India, Malay Archipelago, Marianas. 



Genus GOBIUS (Artkdi) Linn/CUv'^. 



267. Gobius deltoides sp. nov. 



Head 3.50 ; depth 5 ; eye 4 ; interorbital 2 into eye ; snout 3 

 into head ; D. vi, i 11 ; A. i 11. Scales 28 from upper posterior 

 margin of opercle to caudal ; no lateral line ; head fully scaled. 

 Body slightly elongate, compressed posteriorly. Branchiostegals 5. 

 Pseudobranchiae present. Teeth in two series in each jaw, the 

 outer row with larger recurved canines. Ventral fins united, form- 

 ing a disk which is attached only at its base. Caudal rounded. 

 Base of anal about equal to base of soft dorsal. Color in spirits: 

 Yellowish white w4th about seven reddish brown blotches along the 

 sides above the axis, alternating with similar spots below the axis. 

 A black line extends verticall_\- down from the lower margin of orbit 

 to a brown spot below the eye; here the line divides into two, which 

 extends under the chin, one on a line with the eye, the other form- 

 ing an angle dire(5led forward, the tw^o lines thus forming the Greek 

 letter delta. These two lines are broken by the isthmus. Anal 

 fins slaty blue. Ventrals with a wash of bluish. The remaining 

 fins are grayish with numerous small brown spots and lines. 

 Eighteen specimens, length 1-2 inches. Guam, June 2, 1900. 

 Hab. Marianas. 



Genus BI/EOTRIS (Grenow) Block & Schneider. 



268. Bleotris miniatus sp. nov. 



Head 3.50; depth 3.25; eye 3; snout equal to diameter of eye; 

 the interorbital equal to pupil; D. vi 7; A. 11 9. vScales 26. Body 

 oblong, slightly elongated. Teeth in jaws villiform, with some 

 outer enlarged canines ; no teeth on vomer or palatines. Fins: 

 The third dorsal spine terminates in an elongated filament reaching 

 half of the distance to base of caudal. The longest soft rays of 

 dorsal and anal are about equal in length, and equal to length of 

 head. Caudal slightly rounded. Pe(5lorals slightly longer than 

 head. Color in spirits: Olive brown with darker markings above 



